S-90128A254 1/4"-20 x 2 1/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
- Zinc-plated alloy steel construction provides superior corrosion resistance, extending the screw's service life in harsh industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening and maintenance needs.
- Hex socket drive design allows for high-torque installation with standard tools, enabling quick and efficient assembly in confined spaces.
- Partially threaded shank offers optimal grip and clamping force control, ideal for applications requiring precise joint compression.
- Compliance with ASTM A574 ensures consistent quality and mechanical properties, providing peace of mind for critical engineering projects.
- RoHS 3 and REACH compliance makes these screws suitable for use in regulated industries, supporting environmental and safety standards.
Professional Applications & Engineering Value
These 1/4"-20 UNC socket head cap screws are engineered to address common industrial challenges such as vibration-induced loosening and material fatigue. The zinc-plated alloy steel offers excellent durability against corrosion, while the coarse thread spacing and Class 3A thread fit provide superior holding power in dynamic loads. Ideal for machinery assembly, automotive components, and heavy-duty equipment, these partially threaded screws ensure reliable fastening in high-stress environments. The hex drive facilitates easy installation with standard wrenches, reducing assembly time and improving workflow efficiency in maintenance and production lines.
Specification Summary & Compliance
This product features a Class 3A thread fit with UNC coarse thread spacing, ensuring precise dimensional accuracy per industry standards. Manufactured in compliance with ASTM A574 specifications, it guarantees consistent mechanical properties including Rockwell C37 hardness. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making it suitable for use in environmentally conscious and regulated industrial applications.
